diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2d396150..073f0107 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,6 +84,11 @@ else (WithSharedLibluv)
   else ()
     include_directories(deps/luv/deps/luajit/src)
     list(APPEND LUVI_LIBRARIES luajit-5.1)
+
+    set(luajit_vmdef ${CMAKE_CURRENT_BINARY_DIR}/deps/luv/vmdef.lua)
+    set_source_files_properties(${luajit_vmdef} PROPERTIES GENERATED TRUE)
+
+    list(APPEND LUVI_DEFINITIONS WITH_LJ_VMDEF)
   endif ()
 
   list(APPEND LUVI_LIBRARIES libluv_a uv_a)
@@ -134,6 +139,7 @@ lua_add_executable(luvi
   src/lua/init.lua
   src/lua/luvipath.lua
   src/lua/luvibundle.lua
+  ${luajit_vmdef}
   ${lpeg_re_lua}
 )
 
diff --git a/src/luvi.h b/src/luvi.h
index a1f827e7..8f39a9f7 100644
--- a/src/luvi.h
+++ b/src/luvi.h
@@ -58,6 +58,9 @@ int luaopen_lpeg(lua_State* L);
 #ifdef WITH_PLAIN_LUA
 LUALIB_API int luaopen_bit(lua_State *L);
 #endif
+#ifdef WITH_LJ_VMDEF
+LUALIB_API int luaopen_vmdef(lua_State *L);
+#endif
 
 void luvi_openlibs(lua_State *L);
 
diff --git a/src/main.c b/src/main.c
index 3ea38be4..90629766 100644
--- a/src/main.c
+++ b/src/main.c
@@ -131,6 +131,11 @@ static lua_State* vm_acquire(){
   lua_pushcfunction(L, luaopen_luvipath);
   lua_setfield(L, -2, "luvipath");
 
+#ifdef WITH_LJ_VMDEF
+  lua_pushcfunction(L, luaopen_vmdef);
+  lua_setfield(L, -2, "jit.vmdef");
+#endif
+
 #ifdef WITH_CUSTOM
   luvi_custom(L);
 #endif